Fix malformed CBOR body

[lauzadis]

Background

The body seems to have been inadvertently malformed in this commit.

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[rhernandez35]

The original payload is valid base64 and decodes into valid CBOR. The trailing = you added does not change the decoded payload – it's purely additional padding and is ignored. This demonstration:

    @Test
    public void decoding() {
        String s = "v2hkZWZhdWx0c79tZGVmYXVsdFN0cmluZ2JoaW5kZWZhdWx0Qm9vbGVhbvVrZGVmYXVsdExpc3Sf/3BkZWZhdWx0VGltZXN0YW1wwQBrZGVmYXVsdEJsb2JDYWJja2RlZmF1bHRCeXRlAWxkZWZhdWx0U2hvcnQBbmRlZmF1bHRJbnRlZ2VyCmtkZWZhdWx0TG9uZxhkbGRlZmF1bHRGbG9hdPo/gAAAbWRlZmF1bHREb3VibGX6P4AAAGpkZWZhdWx0TWFwv/9rZGVmYXVsdEVudW1jRk9PbmRlZmF1bHRJbnRFbnVtAWtlbXB0eVN0cmluZ2BsZmFsc2VCb29sZWFu9GllbXB0eUJsb2JAaHplcm9CeXRlAGl6ZXJvU2hvcnQAa3plcm9JbnRlZ2VyAGh6ZXJvTG9uZwBpemVyb0Zsb2F0+gAAAABqemVyb0RvdWJsZfoAAAAA//8";
        byte[] blob = Base64.getDecoder().decode(s.getBytes(StandardCharsets.UTF_8));
        byte[] blob2 = Base64.getDecoder().decode((s + "=").getBytes(StandardCharsets.UTF_8));
        assertArrayEquals(blob, blob2);
        System.out.println(blob.length + " " + blob2.length);
    }

passes and prints "347 347".

[rhernandez35]

Seems the JDK parser is happy to parse without padding, but the Kotlin SDK parser requires it. This is fine for compatibility purposes.